PNEL

PNEL is a file format that is used by Puzzle Swap of StreetPass Mii Plaza for loading additional puzzles to the 7 default ones. PNEL probably stands for Panel.

File Format

Header

Offset	Size	Description
0x00	0x04	Magic word "PNEL"
0x04	0x04	Magic word "0800". Probably last 4 digits of the japanese title ID.
0x08	0x04	Number of puzzles
0x0C	0x04	Unknown. Always 0x00000001
0x10	0x04	CRC-32 over the 0x14 bytes of the header with this field being 0.

After the header the first additional puzzle begins.

Puzzle Entry

Offset	Size	Description
0x00	0x04	Order number. First puzzle is a 7 because 0-6 are the preinstalled puzzles
0x04	0x04	Unknown. Probably some CRC-32
0x08	0x04	Absolut offset of start of puzzle image
0x0C	0x04	Absolut offset of start of puzzle settings
0x10	0x04	Absolut offset of start of puzzle model/figure
0x14	0x04	Size of puzzle image
0x18	0x04	Size of puzzle settings
0x1C	0x04	Size of puzzle model/figure
0x20	0x04	CRC-32 over data of the puzzle image
0x24	0x04	CRC-32 over data of the puzzle settings
0x28	0x04	CRC-32 over data of the puzzle model/figure
0x2C	0xC00	Name of the puzzle in different languages
0xC2C	0x01	ID of number of puzzle pieces: 0 => 15 pieces; 1 => 24 pieces; 2 => 40 pieces
0xC2D	0x01	Pink puzzle pieces
0xC2E	0x02	Unknown or Padding

The data of the image, settings and model/figure are always padded at the end with 0x00 until size is divisible by 4 (4 byte alignment). These padding bytes are not part of the CRC-32 calculation